package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 新增菜品
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);

        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }


    }

    /**
     * 分页查询菜品
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    @Transactional
    public void deletBatch(List<Long> ids) {
        //售卖状态的是起售的不能删
        for (Long id : ids){
           Dish dish=dishMapper.getById(id);
           if(dish.getStatus()== StatusConstant.ENABLE){
               throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
           }
        }
        //和setmeal_dish套餐绑定的菜品不能删
        List<Long> setmeals=setmealDishMapper.getSetmealIdsWithDishIds(ids);
        if(setmeals!=null && setmeals.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
        }

//        删除对应dish的信息
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除对应口味的信息
//            dishFlavorMapper.deletByDishId(id);
//        }
        //批量删除
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deletByDishIds(ids);


    }

    /**
     * 根据ID查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO selectById(Long id) {
        DishVO dishVO=new DishVO();
        dishVO=dishMapper.selectById(id);
        //封装flavor对象进去
        List<DishFlavor> dlavor=dishFlavorMapper.selectByDishId(id);
        dishVO.setFlavors(dlavor);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    public void update(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        List<DishFlavor> flavors = dishDTO.getFlavors();

        //修改菜品表
        dishMapper.update(dish);
        //修改口味表
        //删除原有的数据
        dishFlavorMapper.deletByDishId(dishDTO.getId());
        //插入已经给的数据
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
//        for (DishFlavor flavor : flavors) {
//            dishFlavorMapper.update(flavor);
//        }

    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
//            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());
            List<DishFlavor> flavors = dishFlavorMapper.selectByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
}
